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alexandr1967 [171]
3 years ago
9

A 2. 0 kg ball is dropped from a rest 10m above the ground. How fast will the ball hit the ground

Physics
1 answer:
prohojiy [21]3 years ago
8 0

Answer:

A little over a second

Explanation:

gravity pulls down on objects at a speed of 9.8 meters a second

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Answer:

• let's first get time

{ \rm{s = ut +  \frac{1}{2}g {t}^{2}  }} \\  \\ { \rm{78.4 = 30t + 5 {t}^{2} }} \\  \\ { \rm{ {t}^{2}  + 6t - 15.68 = 0}} \\  \\ { \rm{time  \approx \: 2 \: seconds}}

• let's find horizontal displacement

{ \rm{s = ut +  \frac{1}{2}g {t}^{2}  }} \\  \\ { \rm{s = (30 \times 2) \times ( \frac{1}{2} \times 0 \times  {2}^{2})  }} \\  \\ { \rm{displacement = 60 \: meters}}

  • g is acceleration due to gravity [ vertically: g is 10 m/s². horizontally: g is 0 ]
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Two parallel metal plates are at a distance of 8.00 m apart.The electric field between the plates is uniform directed towards th
dezoksy [38]
<h2>The K.E of the charge is 1.02 x 10⁻¹⁷ J</h2>

Explanation:

When the charge of 2e is placed in between the plates .

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